rs12094543 — ZMYM4 ZMYM4 rs12094543

ZMYM4 rs12094543 — A Chromatin Regulator at the Crossroads of Fat Distribution and Immunity

The ZMYM4 gene encodes a zinc finger MYM-type containing protein¹¹ zinc finger MYM-type containing protein
a family of chromatin-associated transcription factors that use zinc-coordinated protein domains to regulate gene expression by modifying how tightly DNA is wrapped around histone proteins located on chromosome 1p32. It is expressed broadly across tissues and has emerging roles in fat distribution, immune cell regulation, and developmental gene programs. The rs12094543 variant is an intronic tag SNP within ZMYM4 — it does not alter the protein directly but may influence how and when ZMYM4 is expressed by tagging a regulatory haplotype across the gene body.

The Mechanism

rs12094543 sits at chr1:35,351,102 (GRCh38), approximately 24 kb upstream of rs559986 — the GWAS-significant variant in the same gene associated with waist-hip ratio — and 51 kb upstream of rs113408476, the indel associated with BMI-adjusted waist circumference and A Body Shape Index. All three variants are intronic to ZMYM4, suggesting they tag a common regulatory haplotype.

ZMYM4 encodes a B-MYB binding protein²² ZMYM4 encodes a B-MYB binding protein
B-MYB is a transcription factor that controls cell cycle progression, proliferation, and differentiation in many tissues including adipose and hematopoietic cells. ZMYM4 is highly SUMOylated³³ SUMOylated
SUMOylation is a post-translational modification that changes where a protein goes in the cell and how it interacts with DNA; it often marks chromatin regulatory proteins, and its interaction with B-MYB strengthens after DNA damage, suggesting a role in transcriptional stress responses that could affect adipocyte differentiation or immune cell maturation under metabolic challenge.

The Evidence

Fat distribution: Two large body-composition GWAS have implicated the ZMYM4 locus. Kichaev et al. (2019)⁴⁴ Kichaev et al. (2019)
FINDOR GWAS of 27 UK Biobank traits, N≈416,000 identified rs559986 in ZMYM4 at genome-wide significance for waist-hip ratio, a marker of central adiposity independent of overall weight. Separately, Christakoudi et al. (2021)⁵⁵ Christakoudi et al. (2021)
GWAS of allometric body-shape indices, N=406,697 UK Biobank participants associated ZMYM4 (rs113408476) with BMI-adjusted waist circumference (p~2×10⁻⁸) and A Body Shape Index (ABSI), a validated marker of visceral fat burden. The ABSI association is notable because it captures waist-to-height risk beyond BMI — a better predictor of cardiometabolic disease than either measure alone.

Rare variant obesity burden: Marenne et al. (2020)⁶⁶ Marenne et al. (2020)
exome sequencing in 2,737 severely obese children vs 6,704 controls, Cell Metabolism identified ZMYM4 among three genes carrying an excess burden of very rare predicted- deleterious variants in cases. This is distinct from the common-variant GWAS signals — it suggests that, beyond the population-frequency tag SNPs, rare loss-of-function variants in ZMYM4 may individually cause severe early-onset obesity through disruption of the transcriptional programs that control fat cell development.

Immune and monocyte regulation: Astle et al. (2016)⁷⁷ Astle et al. (2016)
173,480 participants, 36 blood cell traits, Cell associated the ZMYM4 region (rs11581846) with monocyte percentage of white cells at p=1×10⁻⁹. Elevated monocyte percentage is a marker of chronic low-grade inflammation — the same inflammatory state that underlies visceral fat accumulation and metabolic syndrome. A large allergy GWAS (N=360,838)⁸⁸ large allergy GWAS (N=360,838)
Ferreira et al. 2017, Nature Genetics also identified a ZMYM4- region variant among 136 risk loci for asthma, hay fever, and eczema, implying ZMYM4 sits at an intersection of metabolic and immune gene regulation.

The rs12094543 G allele is uncommon in European populations (~2%) but reaches ~41% in East Asian populations — one of the sharpest allele-frequency gradients at this locus — suggesting meaningful evolutionary differentiation that has not yet been mechanistically explained.

Practical Implications

rs12094543 should be read as a genomic signal pointing to ZMYM4's role in fat distribution, not as a direct functional variant. Individuals carrying the G allele (AG or GG) have a genomic profile consistent with increased central fat accumulation tendency, independent of total body weight. Waist circumference and waist-to-hip ratio are the most actionable proxies: when these diverge from weight-based BMI predictions, the ZMYM4 signal may be part of the explanation.

The co-occurrence of fat-distribution and immune associations at this locus is biologically coherent: visceral adipose tissue is metabolically active immune tissue. Elevated monocyte infiltration into visceral fat depots is an early event in insulin resistance, and chromatin regulators like ZMYM4 may coordinate both the adipogenic differentiation program and the innate immune tone of adipose tissue.

Interactions

rs559986 and rs113408476 (ZMYM4 intronic, same gene): These are the GWAS- significant body-shape variants in ZMYM4, both intronic and located within ~50 kb of rs12094543. They likely tag an overlapping regulatory haplotype. If multiple ZMYM4 intronic variants are present together, they may represent a high-risk haplotype for central adiposity rather than independent signals — their combined effect has not been formally tested.

rs11581846 (ZMYM4 region, monocyte percentage and telomere length): This same ZMYM4-region variant has been independently associated with both monocyte immune regulation and telomere length. The convergence of adiposity, immunity, and cellular aging signals at the ZMYM4 locus is consistent with a chromatin regulator that coordinates stress-responsive transcriptional programs across multiple tissue types.